York EX Series User Manual

JOHNSON CONTROLS
171
SECTION 8 – TROUBLESHOOTING
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
8
ABNORMAL SOLUTION AND REFRIGERANT
LEVELS
Causes of abnormal levels of solution and refrigerant
and countermeasures against them are shown below If
the level of the solution or refrigerant is abnormal, cor-
rect it according to the following procedure.
TABLE 53 - ABNORMAL SOLUTION AND
REFRIGERANT LEVELS
SECTION
NORMAL
CONDITION
ABNORMAL
CONDITION
CAUSE COUNTERMEASURE
Refrigerant
Overow
(G101)
High temperature of
cooling water inlet
temperature.
• See if the cooling water supply rate is conformed to
the specication. (Check the ow meter, discharge
pressure of the cooling water pump, current, etc.) If the
ow rate is insufcient, check the opening ratio of the
ow controller valve and check the strainer for clogging.
• Check the capacity of the cooling tower.
• See Purge Procedure on page 130.
• Check the capacity of the vacuum pump.
• Check the purge unit for trouble.
• Purge non-condensable gas from the absorption chiller-
heater.
• If partial-load operation is continued for a long period,
non-condensable gas tends to stay in the absorber.
In this case, purge directly from the low pressure side
(absorber), See Purge Procedure on page 130 .
Low temperature of
chilled water outlet
temperature.
Cooling water tube
fouling
Purge trouble
Air leakage
Refrigerant
Tank
(G102)
Cooling water inlet
temperature is low.
Setpoint error of
automatic start/stop
switch.
• Check cooling water inlet temperature
• Check the setpoint.
Solution
Tank
(G103)
Purging is in
sufcient.
See Purge Procedure on page 130.
Adjusting valve
opening setting error.
Contact your local Johnson Controls Service Center.
Solution is
crystallized.

York EX Series Specifications

General

Brand	York
Model	EX Series
Category	Chiller
Language	English